KNOX1基因在植物复叶发育过程中的调控作用

Regulation of KNOX1 Genes in Compound Leaf Development of Plants

在高等植物中,KNOX1(Class I KNOTTED-like homeobox)基因维持植物顶端分生组织的功能,并在植物叶片发育过程中起到关键作用。近年来研究发现,KNOX1基因在单叶植物和复叶植物的发育过程中表达模式有所差别,叶原基形成后KNOX1基因是否重新上调表达,成为区别单叶植物和复叶植物发育模式的关键。KNOX1基因在豆科IRLC(inverted repeat-lacking clade)分支物种中存在特殊表达模式,LEAFY的同源基因取代了KNOX1基因的功能来控制复叶发生。本文主要介绍近年来KNOX1基因在植物复叶发育过程中的作用,以及在豆科IRLC分支物种中复叶发育的特殊模式。

In higher plants,KNOX1（Class Ⅰ KNOTTED-like homeobox） genes are crucial for maintenance of shoot apical meristem,and play the key role in leaf development.In recent years,KNOX1 genes have been found to show different expression patterns in simple leaf and compound leaf.Up-regulation of KNOX1 after generation of leaf primordium is useful for identification of development models for simple leaf and compound leaf.KNOX1 gene is unique during compound leaf development in the branch of leguminous plant IRLC（inverted repeat-lacking clade）.LEAFY gene can substitute KNOX1 gene to control compound leaf development.This paper reviewed the latest progress of research on LEAFY function in compound leaf development of leguminous plants,and special expression pattern of compound leaf development in IRLC.